The "special" rate: what 20% deposit actually buys you
From Aaron’s TikTok: “Mortgage repayments today with the special rate — which you get when you have a 20% deposit in New Zealand.”
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Posted 3 July 2026
The short version
- The rates NZ banks advertise are usually "special" rates — and the headline condition is at least 20% deposit or equity.
- Below 20%, you typically pay the standard rate or a low-equity margin or premium on top, so the same house costs more per week.
- The gap sounds small but compounds for decades — which is why hitting 20%, or getting back to it, is worth real effort.
- You do not always have to wait for 20% to buy — but you should always have a plan for getting the premium off.
Special vs standard: the two-tier rate system
Look closely at any NZ bank’s rate card and you will see two columns. The "special" rates — the sharp ones in the ads — come with conditions, and the big one is having at least 20% deposit or equity. The "standard" rates sit noticeably higher, and low-deposit borrowers can also face a low-equity margin added to their rate or a one-off premium, because the bank prices the thinner buffer as extra risk.
So two buyers can purchase identical houses at identical prices and pay genuinely different amounts every single week, purely because of which side of the 80% line they started on. When you run repayment numbers, make sure you are running them on the rate you would actually get, not the advertised one.
What the gap does to real repayments
A fraction of a percent sounds like nothing. Spread over a mortgage-sized balance for up to 30 years, it is anything but — the difference compounds into a meaningful weekly amount and a very large lifetime one. This is the quiet argument for pushing your deposit towards 20% if you are close: the last few percent of deposit effectively earns you a discount on every repayment you will ever make.
It is also the argument for revaluing once you own. Repayments plus rising value can pull your equity past 20% well before you notice, and at that point the low-equity pricing can usually come off — sometimes at refix, sometimes with a revaluation. Banks do not always volunteer this. It pays to ask, or to have someone ask for you.
Should you wait for 20%?
Not automatically. Renting for extra years while you chase the last few percent has its own cost, and for many buyers getting in at 10 or 15% — wearing the low-equity pricing for a while, then shedding it as equity builds — beats waiting. The right answer depends on your rent, your savings rate and your market, which is to say: it is a numbers question, not a rule.
Either way, know which rate tier you would land in and what your repayments would really be. Run the numbers on the calculator, and if the wait-or-buy question is live for you, it is precisely the sum Aaron works through with people every week.
This is general information, not personalised financial advice. For advice on your situation, talk to Aaron.
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